package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        //判断套餐关联关系
        LambdaQueryWrapper<Dish> dishQW = new LambdaQueryWrapper<>();
        dishQW.eq(Dish::getCategoryId,id);
        int dishCount = dishService.count(dishQW);
        if (dishCount > 0) {
            throw new CustomException("此套餐有关联菜品，不能删除");
        }
        //判断分类关联关系
        LambdaQueryWrapper<Setmeal> mealQW = new LambdaQueryWrapper<>();
        mealQW.eq(Setmeal::getCategoryId,id);
        int setmealCount = setmealService.count(mealQW);
        if (setmealCount > 0) {
            throw new CustomException("此分类有关联菜品，不能删除");
        }
        //无关联关系，删除套餐 || 分类
        this.removeById(id);
    }

}
